Someone

on *:text:*#*:#:{
  if ($nick isop $chan) || ($nick ishop $chan) || ($nick isvoice $chan) halt
  if (#IRCHelp isin $1-) || (#Swiftswitch isin $1-) || (#RSHelp isin $1-) || (#PC isin $1-) || (#Greenjer isin $1-) || (#rsmarket isin $1-) || (#QuestHelp isin $1-) || ($chan isin $1-) halt
  else {
    set %ad.chan $wildtok($1-,#*,1,32)
    /mode # +b ~c: $+ %ad.chan
    /tb $nick Please don't use '#' in this channel
    unset %ad.chan
  }
}